Electrostatically self-assembled chitosan derivatives working as efficient cathode interlayers for organic solar cells

Zhang, Kai; Xu, Rongguo; Ge, Wenjiao; Meng, Qingda; Zhang, Guangzhao; Xu, Qingyu; Huang, Fei; Cao, Yong; Wang, Xiaohui

doi:10.1016/j.nanoen.2017.02.022

Cited by 47 publications

(47 citation statements)

References 51 publications

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“…However, the slope for the device without an ETL increased to 1.66 k B T/q , demonstrating that the recombination mechanism transforms to monomolecular and/or trap‐assisted recombination in this device, which can be ascribed to diffused metal atoms acting as trap sites (more specifically hole traps) in the active layer (as depicted in Figure c,d). The photocurrent density ( J ph ) versus the effective voltage ( V eff ) of the all‐PSC was determined to obtain the charge extraction efficiency in these devices . As shown in Figure b, for the devices with PNDIT‐F3N as an ETL, both fresh and annealed devices have nearly identical curves, demonstrating that the charge extraction efficiency is unchanged, even after 100 h of thermal annealing at 80 °C.…”

Section: Device Data For All‐pscs With Different Etlsmentioning

confidence: 99%

11.2% All‐Polymer Tandem Solar Cells with Simultaneously Improved Efficiency and Stability

et al. 2018

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All-polymer solar cells (all-PSCs) that contain both p-type and n-type polymeric materials blended together as light-absorption layers have attracted much attention, since the blend of a polymeric donor and acceptor should present superior photochemical, thermal, and mechanical stability to those of small molecular-based organic solar cells. In this work, the interfacial stability is studied by using highly stable all-polymer solar cell as a platform. It is found that the thermally deposited metal electrode atoms can diffuse into the active layer during device storage, which consequently greatly decreases the power conversion efficiency. Fortunately, the diffusion of metal atoms can be slowed down and even blocked by using thicker interlayer materials, high-glass-transition-temperature interlayer materials, or a tandem device structure. Learning from this, homojunction tandem all-PSCs are successfully developed that simultaneously exhibit a record power conversion efficiency over 11% and remarkable stability with efficiency retaining 93% of the initial value after thermally aging at 80 °C for 1000 h.

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Section: Device Data For All‐pscs With Different Etlsmentioning

confidence: 99%

11.2% All‐Polymer Tandem Solar Cells with Simultaneously Improved Efficiency and Stability

et al. 2018

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“…Through electrostatic adsorption for 3 h, the prepared PEI-g-DF was anchored onto a gold layer of a QCM-D resonator with an average film thickness of 7 nm (Supplementary Figure 2), which remained stable during the following experiments. Then, a QCM-D adsorption experiment, which is a reliable surface-sensitive technology capable of providing real-time information about variations in the mass and viscoelastic properties of a layer, 35 was performed to monitor the dynamic adsorption processes of diverse mono-and tri-saccharides on the PEI-g-DF surface. As shown in Figure 2a, the distinct frequency variation (ΔF) curves corresponding to the adsorption of Gal, Man and Glc indicated that this polymer film displayed a satisfactory chemoselectivity toward these glucose homologs.…”

Section: Resultsmentioning

confidence: 99%

A biomimetic design for a sialylated, glycan-specific smart polymer

Chen

Wang

et al. 2018

NPG Asia Mater

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Increasing evidence has indicated that glycans and their interactions with glycan-specific binding proteins have crucial roles in most physiological processes. One emerging topic in biomaterials is the construction of smart materials capable of recognizing and responding to these valuable glycans. However, because of the complicated compositions and structures as well as the low abundances and microheterogeneity of glycans, developing glycan-responsive materials with a high sensitivity and specificity is a long-term, challenging goal. Here, we report a biomimetic polymer capable of capturing and discriminating sialo-complex-type glycans with the core Neu5Ac-Gal-GlcNAc-Man sequence, which is one of the most effective biomarkers for cancer detection. As an optimized dipeptide, L-Asp-L-Phe has a strong but differential binding affinity for N-acetyl-neuraminic acid (Neu5Ac), N-acetyl-glucosamine (GlcNAc), galactose (Gal), and mannose (Man), which are the core construction units of sialylated glycans. In addition, the L-Asp-L-Phe-grafted polyethyleneimine film displays remarkable adsorption behavior for the model sialylated glycans and can discriminate their linkage isomers, which is accompanied by significant changes in the surface morphology and stiffness. These features facilitate the highly selective capture of sialylated glycopeptides from complex protein samples using PEI-g-L-Asp-L-Phe-modified mSiO 2 @SiO 2 @Fe 3 O 4 core-shell microspheres. The mechanism analysis demonstrates that the favorable polymeric spatial structures and multiple synergetic hydrogen-bonding interactions among the dipeptides and glycan are the main driving forces, indicating a clear direction for designing glycan-specific biomaterials.

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“…This organic solar cell is schematically demonstrated in Fig. 13 [112] in lithium-ion batteries. After 1000 cycles, the carboxymethyl chitosan-based binder exhibited around 98% retention capacity compared to 95.4% retention capacity of commercial PVDF based binder [116].…”

Section: Digestionmentioning

confidence: 99%

Chitin and Chitosan Based Composites for Energy and Environmental Applications: A Review

Peter

Lyczko

Gopakumar

et al. 2020

Waste Biomass Valor

117

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Chitin and chitosan are the second most abundant natural biopolymers in the curst of the earth. These polysaccharide biopolymers have a long linear chain-like structure connected with β-d glucosidic linkage with the functionalizable surface groups. Because of the structural features, these biomaterials exhibit unique physical, chemical, mechanical and optical properties, which contributed to the tunable and outstanding properties such as low density, high porosity, renewability, natural biodegradability, and environmental friendliness, etc. Chitin was synthesized via mechanical, chemical, chemo-mechanical, and eco-friendly biological methods and the deacetylation of the synthesized chitin carried for the preparation of chitosan. With the chemical modification used for the preparation of chitosan, there occurs some minor change in characteristics; however, most of the properties were relatable due to major similarities in the microstructures. The inherent antibacterial, non-toxic, and biodegradable properties with the ease of processibility of both polymer has the potential to become a successful alternative to its synthetic counterparts for energy and environmental applications. However, the poor mechanical and thermal properties in comparison to the conventional alternatives have restricted its widespread applications. This review addresses various areas such as extraction techniques of chitin and synthesis of chitosan, discussion of the common characteristics of both polymers together such as crystallinity, thermal properties, mechanical properties, hydrophilicity, and surface charge. Moreover, this review paper also addresses the common functionalization techniques for both polymer and the use of both unmodified chitin and chitosan along with their derivatives in environmental and energy applications such as air pollution, heavy metal adsorption, dye adsorption, biosensors, EMI shielding, fuel cell, solar cell, lithium-ion batteries, and biofuels.

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Electrostatically self-assembled chitosan derivatives working as efficient cathode interlayers for organic solar cells

Cited by 47 publications

References 51 publications

11.2% All‐Polymer Tandem Solar Cells with Simultaneously Improved Efficiency and Stability

11.2% All‐Polymer Tandem Solar Cells with Simultaneously Improved Efficiency and Stability

A biomimetic design for a sialylated, glycan-specific smart polymer

Chitin and Chitosan Based Composites for Energy and Environmental Applications: A Review

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